Guess who this 4th degree KofC is

I mean the guy on the right.

See his Baldric?  The sash under his tuxedo?  That is a mark of a 4th degree Knight of Columbus.

The other Knight, third from left, is wearing a Jewel of the Office from his neck, and looks like he is a Grand Knight, since his Jewel looks like an anchor.

And the prelate with the Knights is wearing his ferraiolo or clerical cape which is worn by clerics on formal occasions and remains so today.  The practice is NOT abolished.

Judging by his watered-silk cape, he might be either a papal legate, nuncio or a cardinal since these ranking prelates are the only ones allowed to wear that kind of a ferraiolo.

So chime in your guess.